Accessing additional mailboxes

You can access another person’s or department mailbox if you have been granted the appropriate permissions to their mailbox. 

Open another person’s mailbox in a separate browser window in Outlook Web App

1. Log in to your mailbox using Outlook Web App. (https://outlook.office.com)
2. In the Navigation bar on the top of the Outlook Web App screen, click on your name. A drop-down list will appear. Click Open another mailbox.
3. Type the email address of the other mailbox that you want to open, and click Open.